Protein shakes with water and cream leave me hungry if I don't eat something else like chicken, fish, eggs or beef with it. Tinned meat? a whole can of tuna in water only has ~100 calories, but I always mix it with mayo.

Sounds like you're trying a modified fast mimicking or PSMF regimen?
Best beware of "rabbit starvation", talk about rabbit food:

http://knowledgenuts.com/2015/01/21...th-rabbit-meat/

Fasting and ketosis both cause me a degree of insomnia. I am experimenting with a few carbs before bed to see if that helps. Just don't have the appetite I used to, but still stuck at the same weight.